Desert meeting point 3 generate with sand where it should not

One of the meeting points found on deserts generate with sand on it where it should not, covering the space of the meeting point. The amount is a bit randomized but it consistently generate with it, a similar issue happens with a plains village meeting point (see MCPE-177676).

Steps to Reproduce:
1. Create one or various worlds (use a random seed).
2. Find a desert village with this kind of meeting point.
3. Observe it.

Observed Results:
There is sand covering the space around it.

Expected Results:
Only the sand on the ground should be here.

Here are a few footages of the bug, on various different villages: